Son Heung-min struck late to fire Tottenham into second place in the Premier League on Saturday as Gonzalo Higuain opened his account for Chelsea in a five-goal rout at Stamford Bridge.
Spurs looked to be heading for their first league draw of the season at Wembley but Son's 83rd-minute goal earned Mauricio Pochettino's men a hard-fought 1-0 win over Newcastle and enabled them to leapfrog Manchester City, who play on Sunday.
Chelsea beat bottom side Huddersfield 5-0 thanks to two goals apiece from Higuain and Eden Hazard and a late header from David Luiz as they returned emphatically to goalscoring form.
Tottenham are now just four points behind leaders Liverpool, who are in action at West Ham on Monday, but just as significantly they consolidated their position in the top four after their 19th win in 25 matches.
Spurs enjoyed more than 70 percent possession but faced a dogged Newcastle, buoyed by a stunning 2-1 win over Manchester City in midweek that carried the Magpies five points clear of the relegation zone.
An incredible clearance off the line from Fabian Schar denied what seemed a certain goal for Christian Eriksen.
But Son again stepped up to the mark, just as he did with an equaliser against Watford in midweek, with his 14th goal of the season. The South Korean had a helping hand from Newcastle goalkeeper Martin Dubravka, who let Son's powerful effort slip beneath his grasp to undo all his side's good work.
Chelsea manager Maurizio Sarri admitted before the match against bottom side Huddersfield that he had found it hard to get any rest since Wednesday's humiliating 4-0 defeat at Bournemouth.
His side went ahead in the 16th minute through Higuain and doubled their lead with a Hazard penalty on the stroke of half-time. Both players scored again midway through the second half and Luiz made it 5-0 with a late strike as Chelsea returned to the top four at the expense of Arsenal.